Benjamin zurn



UNITED STATES PATENT OFFICE.

BENJAMIN ZURN, OF NEW YORK, N. Y.

IMPROVED SAWlNG-MACHINE ADAPTED FOR THE USE OF THE AUGER AND CHISEL.

Specification forming part of Letters Patent No. 36,435, dated September 9, 1862.

To all whom, it may concern:

Beit known that I, BENJAMIN ZURN, of the city, county, and State of New York, havein vented a new and Improved Sawing-Machine adapted for the Use of the Auger and Chisel; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanyin g drawings, making a part of this specification, in which- Figure 1 is an end view of my invention. Fig. 2 is a front view of the same. Fig. 3 is a detached vertical section of a portion of the same, taken in the line so :0, Fig. 2. Fig. 4 is a detached view of the tools employed with the same.

Similar letters of reference indicate corresponding parts of the several figures.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a platform or bed, which is supported at a suitable height by a proper framing, B, and x m are two uprights, which are attached to the framing B at one side and connected at their upper ends by a cross-bar, b, as shown clearly by Fig. 2.

0 represents a sliding o-r adjustable head, which may be .of metal and of quadrilateral form, as shown clearly in Fig. 3. This head 0 is secured to the uprights a a at any desired point by a-clamp formed of a screw, 0, passing through the head at one side and through a plate, d, which is at the outer sides of the uprights a a. By this arrangement it will be seen that the head 0 may be secured at any desiredv point within the scope of its adjustmentor movement between the uprights a a.

To the back end of the head 0, between the uprights a a, there is attached a link, f, the upper end of which is connected to the back end ofa bar, D, which rests 0r bears on a spiral spring,'E, on the upper part of head 0, said spring having a tendency to keep the bar D in an upward position, as will be fully understood by referring to Fig. 1. To the front part of the bar D there is connected a vertical arbor, F, which is fitted in the front part of the head 0 and allowed to work freely up and down therein. The arbor F is connected to the bar D by a swivel-joint, G, and the upper part of the arbor is provided with a feather, g, which is fitted in a groove in a collar, H,

that is allowed to turn freely in the head 0. This collar H admits of the arbor F rising and falling freely within it, and at the same time admits of the arbor F being turned by means of a lever, I. (See Figs. 2 and 3.)

On the front end of the bar D there is placed a roller. J, over which astrap, K, passes. This strap K is attached at its back end to the upper end of a spring, L, which is secured at its center to a small rock-shaft, M, fitted between bearings h h, attached to the uprights a a. The lower end of the spring L has a strap, N, attached, which strap passes under a roller, 0, in the frame B, and is connected to a slide, P, which is fitted between vertical guides i t. The end of the strap K is also attached to a slide, Q, which is fitted in avertical groovein the front end of the head 0. Each slide P Q has a reversible hook,j, attached for thepurpose of connecting saws S S to the slides, the saw S being a slitting-saw and having its outting-plane parallel with the sides of the platform A, and the saw S being a scroll-saw and having its cutting plane at right angles to that of the saw S. The ends of the hooks j have reverse positions, in order to admit of this different adjustment of the saws.

In the framing B, near one end, there is placed a driving-shaft, T, which has apulley, U, at one end and a cranlgV, near its oppositeend. ThepnlleyUisconnectedbyaband, \V, with a crank-pulley, X, on a shaft, Y, the latter having a crank, Z, at its innerend.

A is a connecting-rod, which is attached at one end to the pulley X and at the opposite end to the upper part of an arm, 70, which is connected to a rock-shaft, B, in the lower part of the framing B. The rock-shaft B has an arm, Z, at its front end, the two arms is Z being at right angles to each other, and the latter connected by-a link, m, with the lower slide, 1?.-

G is a treadle, which is placed in the lower part of the framing B, and is connected by a link, a, with a bent lever, D, attached to the upper part of framing, said lever D being connected by a rod, E, with the crank V of the driving-shaft T.

F is a wire or strap, which connects bar D with the treadle G.

G is a rod, which is attached at one end by a link to the crank Z of shaft Y. The oppo site end of G is connected by a joint, 1), to the framing B. To the rod G there is attacheda pawl, g, which engages with a ratchet, H, on one end of a roller, 1, the upper surface of which projects a short distance above the surface of the platform A, the roller 1 being at right angles with the sides of the platform A.

J J are screw-rods, which pass vertically through the lower part of the head 0 at its front part and serve to keep the work in proper position. The link f has a strap, attached to its upper end, said strap being connected to a shaft, 9, having a ratchet, h, at one end, into which a pawl, i, catches. By turning shaft the linkf may be more or less elevated, as occasion may require. (See more particularly Fig. 1.)

K is an adjustable gage, which is placed on the platform A parallel with its sides. This gage may be constructed and arranged in the usual way, and therefore does not require a minute description.

L is an arbor, which is placed in suitable bearingsj, at the bottom of head 0. The arbor L has ahorizontal position, and a pulley, M, on its outer end, and said arbor is allowed to slide freely in its bearingsj.

The operation of the machine is as follows: When the implement is used as a boring device, the gage K is removed from the platform A, and the saw is detached from the slides P Q, the belt or band W being cast off from the pulleys U X, and a belt or band, A", put on the pulley U and pulley M of arbor L. By' turning shaft T it will be seen that the arbor L will be rotated, and articles may be bored by placing drills or bits N in' the outer end of the arbor, the latter being moved longitudinally by a lever, 0'.

When the implement is used as a slitting device, the saw S is empl0yed,and also the gage K, the belt or band A being cast off, and the belt or band W beingplaced on its pulleys U A reciprocating motion is given the saw S through the medium of the rod A, arms is Z of shaft B, and link m. The spring L strains the saw S, keeping it at a proper tension, and the roller I feeds the stuff along to the saw, the roller being moved by the action of the pawl g and ratchet.

When the implement is used as a scrollsawing machine, the saw S is employed, the gage K being removed.

When the implementis usedasa mortising-i machine, the chisel a is inserted in the lower end of the arbor F and the belt or bands W A cast off from their respective pulleys, and the wire or strap F applied to; the bar D and the treadle 0. By operating the treadle O with the foot the bar D will be vibrated and the arbor F moved up and down, the chisel a acting upon the work in the usual way. By

adjusting the head 0 higher or lower saws of difierent lengths may be used.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

The adjustable or sliding head 0, in combination with the bar D and the spring L, conneeted to the saw-slides P Q, the saw being driven from the shaft T, substantially as described, and all arranged to operate as and the purpose set forth.

, BENJAMIN ZURN.

Witnesses:

JAMES Lanai), G. W. REED. 

